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arXiv 0810.4132hep-ph
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中微子振荡与退相干

Neutrino Oscillations and Decoherence

Luca Visinelli, Paolo Gondolo

摘要:

本文给出了从量子场论第一性原理得到的狄拉克或马约拉纳中微子味之间跃迁几率的表达式。我们的推导是基于一个标准的量子力学设置,包括中微子生产的具体机制,只有在它指定的初始状态。我们的跃迁几率表达式再现了平面波极限下的通常公式,并显示了正确的非相对论性和超相对论性行为。它也允许一个简单的理解的退相干的振荡和不同的中微子质量本征态的到达时间的问题。我们展示了两代中微子的情况下的数值例子。

英文摘要:

We present an expression for the transition probability between Dirac or Majorana neutrino flavors obtained from first principles within quantum field theory. Our derivation is based on a standard quantum mechanical setup and includes the specific mechanism of neutrino production only in as much as it specifies the initial state. Our expression for the transition probability reproduces the usual formula in the plane wave limit and shows the correct non-relativistic and ultra-relativistic behaviors. It also allows a simple understanding of the decoherence of the oscillations and of the question of the arrival times of the different neutrino mass eigenstates. We show numerical examples for the case of two neutrino generations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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